Chalk-rimmer.



L. CRAWFORDLY CHALK RIMMERM APPLICATION FILED FE8.10.19I7- $5 9 I Patented May 7, 1918,

JLELE CJEEAWFORD, F SPOKANE, WASHINGTON.

CI-IALK-RIMMER.

Specification of Letters Patent.

Patented May "3, 1918..

Application filed. February 10, 1917. Serial No. M7317.

To all whom it may concern:

Be it known that LEE. CRAWFORD, a citizen of the United States of America, residing at Spokane, in the county of Spokane and State of Washington, has invented certain new and useful Improvements in Chalk- Rimmers, of which the following is a specification.

This invention pertains to chalk rimmers and has for its object to provide a mechanical means for riinming'down the edges of chalk.

For instance, where the cues are chalked by 'means of round or square pieces of chalk a round opening is soon formed. in the chalk and heretofore it has been the custom to trim down the edges of the chalk with a penknife by hand, so that the chalk may be continued in use.- This method consumes a great deal of time and the purpose of this invention is to provide a means whereby this work may be rapidly done by a machine for that purpose.

T he machine comprises a clamp or holder for the chalk, a cutter for trimming the edgeitthereof, means for advancement of the cutter and means for stopping the advance ment of the cutter after the edges of the chalk opening have been cut back a suiiicient distance.

The machine will be hereinafter particularly described and illustrated in the accompanying drawings, in which- Figure 1, is a combined side elevation and sectional view of the device.

Fig. 2, is an end elevation of the same,

Fig. 3, is a side elevation of the cutter frame,

Fig. 4, is an edge elevation of the same with the cutters in place therein,

Fig. 5,-is a side elevation of one of the cutter blades detached, and

Fig. 6, is an end elevation of the same.

In a detail description in which like numerals refer to like parts throughout the several views, a casingv 10 is provided in which is horizontally and rotatably mounted a shaft 11 on one end of which is threaded a cap 12. and on the other end a-cutter frame 13. Cut onto'the shaft 11 is an elongated gear 14. Encircling said shaft 11 between bearings 15 and the cutter frame 13 is a coil spring 16. p

Directly in front of the cutter frame 13 and through the casing 10 is cut an open in billiard and pool parlors ing 17 large enough to permit of the insertion therethrough of a piece of chalk of the size used for the purpose named. Mounted in front .of the opening 17 is a clamp comprising the members 18 and 19, pivotally connccted at 32, for holding the chalk, serrated edges 20 servingto prevent the chalk from rotating when the cutter is applied thereto. Rotatably mounted beneath the gear 14 and meshing therewith is a gear 21 to which is attached a crank 22. Brackets 23 and 24 and a thumb screw 25 serve as means for at-' taching the device to a'table or a board. Knives 26 are set in the cutter frame 13 as indicated in Fig. 4:, the same being inserted in grooves 27 and held in position by setscrews 28. An outwardly extending projection 29 at the center of the cutter frame 13 is provided which serves to hold the knives 26 away from the chalk after said "projection has reached the bottom of the opening in the chalk.

An opening 30 is provided through the frame 10 directly underneath the cutter frame 13 to provide for carrying away the chalk grindings. When it is desired to trim a piece of chalk, the clamp portion 18 is elevated by means of the handle 31 to the position shown, the cutter frame 13 is drawn inwardly by means of a hand hold on the cap 12 and the chalk inserted through the opening 17. Then the clamp member 18 is manually turned downwardly to the position of the dotted lines 18 the handle 31 taking the position of the dotted lines 31, the cap 12 is 7 released whereby the coil spring 16 forces the cutter head against the chalk, the clamp holds the same and the serrated edges 20 prevents the same from rotating. The crank 22 is manually turned whereby the cutter frame 13 is rapidly rotated and the knives 26 soon cut away the rim of the chalk opening, the projection 29 serving as a stop for the advancement of the knives when the bottom of the opening in the chalk is reached thereby. Then the clamp member 18 is -e1e- I vated to theposition shown and the chalk removed. v

In case the machine is for trimming chalk cylindrical in form the opening 17 and the serrated edges 20 are made round as shown but these surfaces may be made toconform to any other form of chalk.

What is claimed is,

' A chalk trimmer comprising a. frame a clamp for holding the chalk, cutter blades mounted in acutter frame on the end of a shaft rotatably mounted in front of said. clamp, said shaft being slidabl'y meunted in a bearing in said frame, a coil spring encircling said shaft between said bearmg aed;

said; cutter frame, means for rotating smd shaft and a pro ection in the end. of seici shaft extending eutwerdly beyond. said. cuttar-blades as a. means for stopping the ad- W 1:13A Keys,- MERL Jos-msom. 

